Linux Commands

RPM Version Info:
- ```
rpm -qa foo
```
Shutdown X11:
- ```
init 3
```
Reboot the System:
- ```
init 6
```
Mount a CDROM:
- ```
mount /dev/cdrom
```
Unmount a CDROM:
- ```
umount /dev/cdrom
```
List Start Up Scripts:
- ```
chkconfig --list
```
Turn On Start Up Script:
- ```
chkconfig service start
```
Turn Off Start Up Script:
- ```
chkconfig service off
```
Get the kernel version by typing
- ```
uname -r
```
Format USB Device to Vfat
- ```
 mkfs.vfat -F 32 /dev/sda1
```
How to create tarball's assuming your directory is called foo:
- ```
tar -cvzf foo.tar.gz /dir/foo
```
Add user to Virtual Postfix Database:
- ```
postmap virtual
```
Reload Postfix:
- ```
 postfix reload
```
Produces Postfix Queue List:
- ```
 postqueue -p
```
Also Produces Postfix Queue List:
- ```
mailq
```
Flush Postfix Queues:
- ```
 postqueue -f
```
Remote Desktop for Windows (toggle -f on or off for fullscreen):
- ```
rdesktop -g 1152x768 -a 24 -b -f mail
```
Unzip bz2 files:
- ```
bzip2 -cd files.tar.bz2 | tar xvf -
```
Show program install path:
- ```
which {program}
```
Removes mail from mail queue
- ```
postsuper -d {queue id}>
```
Displays Hardware info from BIOS (must have installed dmidecode installed)
- ```
dmidecode
```
To get a Network list of current IP/Hostname's, type the following on the command line:
- ```
dig axfr hosthame
```

or to sort by IP type:

dig axfr hostname |grep IN | egrep A |sort -n  -k 5 -k 7 -t .

Type the following to setup rpmq to find true kernel version

alias rpmq='rpm --qf '\''%{NAME}-%{VERSION}-%{RELEASE}.%{ARCH}\n'\'' -q'

Create Database Privileges:

grant all privileges on {DATABASE NAME}.* to {DATABASE USER}@localhost identified by '{DATABASE PASSWORD}';

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